Abstract
AbstractThe simulation of prepregs must regard highly anisotropic, viscoelastic and thermal‐chemical properties. To this end a constitutive model is split into an anisotropic elastic part, which represents the fibre fraction and an isotropic, viscoelastic part, representing the matrix. The second part also contains curing, causing a dependency on time and temperature. During real deep‐drawing processes large deformations up to 50 % occur, which is considered in a formulation at large strains. This model contains an anisotropic elastic part based on a Neo‐Hooke law enhanced by an anisotropic part. A viscoelastic part is added using Hencky‐strains and the work‐conjugate Hill‐stress to transfer a model for small strains into large strains. (© 2011 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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